1 /****************************************************************************** 2 * 3 * Module Name: psloop - Main AML parse loop 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 /* 153 * Parse the AML and build an operation tree as most interpreters, (such as 154 * Perl) do. Parsing is done by hand rather than with a YACC generated parser 155 * to tightly constrain stack and dynamic memory usage. Parsing is kept 156 * flexible and the code fairly compact by parsing based on a list of AML 157 * opcode templates in AmlOpInfo[]. 158 */ 159 160 #include "acpi.h" 161 #include "accommon.h" 162 #include "acinterp.h" 163 #include "acparser.h" 164 #include "acdispat.h" 165 #include "amlcode.h" 166 #include "acconvert.h" 167 168 #define _COMPONENT ACPI_PARSER 169 ACPI_MODULE_NAME ("psloop") 170 171 172 /* Local prototypes */ 173 174 static ACPI_STATUS 175 AcpiPsGetArguments ( 176 ACPI_WALK_STATE *WalkState, 177 UINT8 *AmlOpStart, 178 ACPI_PARSE_OBJECT *Op); 179 180 static void 181 AcpiPsLinkModuleCode ( 182 ACPI_PARSE_OBJECT *ParentOp, 183 UINT8 *AmlStart, 184 UINT32 AmlLength, 185 ACPI_OWNER_ID OwnerId); 186 187 188 /******************************************************************************* 189 * 190 * FUNCTION: AcpiPsGetArguments 191 * 192 * PARAMETERS: WalkState - Current state 193 * AmlOpStart - Op start in AML 194 * Op - Current Op 195 * 196 * RETURN: Status 197 * 198 * DESCRIPTION: Get arguments for passed Op. 199 * 200 ******************************************************************************/ 201 202 static ACPI_STATUS 203 AcpiPsGetArguments ( 204 ACPI_WALK_STATE *WalkState, 205 UINT8 *AmlOpStart, 206 ACPI_PARSE_OBJECT *Op) 207 { 208 ACPI_STATUS Status = AE_OK; 209 ACPI_PARSE_OBJECT *Arg = NULL; 210 const ACPI_OPCODE_INFO *OpInfo; 211 212 213 ACPI_FUNCTION_TRACE_PTR (PsGetArguments, WalkState); 214 215 216 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 217 "Get arguments for opcode [%s]\n", Op->Common.AmlOpName)); 218 219 switch (Op->Common.AmlOpcode) 220 { 221 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 222 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 223 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 224 case AML_QWORD_OP: /* AML_QWORDATA_ARG */ 225 case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ 226 227 /* Fill in constant or string argument directly */ 228 229 AcpiPsGetNextSimpleArg (&(WalkState->ParserState), 230 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), Op); 231 break; 232 233 case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ 234 235 Status = AcpiPsGetNextNamepath (WalkState, 236 &(WalkState->ParserState), Op, ACPI_POSSIBLE_METHOD_CALL); 237 if (ACPI_FAILURE (Status)) 238 { 239 return_ACPI_STATUS (Status); 240 } 241 242 WalkState->ArgTypes = 0; 243 break; 244 245 default: 246 /* 247 * Op is not a constant or string, append each argument to the Op 248 */ 249 while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) && 250 !WalkState->ArgCount) 251 { 252 WalkState->Aml = WalkState->ParserState.Aml; 253 254 switch (Op->Common.AmlOpcode) 255 { 256 case AML_METHOD_OP: 257 case AML_BUFFER_OP: 258 case AML_PACKAGE_OP: 259 case AML_VARIABLE_PACKAGE_OP: 260 case AML_WHILE_OP: 261 262 break; 263 264 default: 265 266 ASL_CV_CAPTURE_COMMENTS (WalkState); 267 break; 268 } 269 270 Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState), 271 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg); 272 if (ACPI_FAILURE (Status)) 273 { 274 return_ACPI_STATUS (Status); 275 } 276 277 if (Arg) 278 { 279 AcpiPsAppendArg (Op, Arg); 280 } 281 282 INCREMENT_ARG_LIST (WalkState->ArgTypes); 283 } 284 285 286 /* 287 * Handle executable code at "module-level". This refers to 288 * executable opcodes that appear outside of any control method. 289 */ 290 if ((WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2) && 291 ((WalkState->ParseFlags & ACPI_PARSE_DISASSEMBLE) == 0)) 292 { 293 /* 294 * We want to skip If/Else/While constructs during Pass1 because we 295 * want to actually conditionally execute the code during Pass2. 296 * 297 * Except for disassembly, where we always want to walk the 298 * If/Else/While packages 299 */ 300 switch (Op->Common.AmlOpcode) 301 { 302 case AML_IF_OP: 303 case AML_ELSE_OP: 304 case AML_WHILE_OP: 305 /* 306 * Currently supported module-level opcodes are: 307 * IF/ELSE/WHILE. These appear to be the most common, 308 * and easiest to support since they open an AML 309 * package. 310 */ 311 if (WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1) 312 { 313 AcpiPsLinkModuleCode (Op->Common.Parent, AmlOpStart, 314 (UINT32) (WalkState->ParserState.PkgEnd - AmlOpStart), 315 WalkState->OwnerId); 316 } 317 318 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 319 "Pass1: Skipping an If/Else/While body\n")); 320 321 /* Skip body of if/else/while in pass 1 */ 322 323 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 324 WalkState->ArgCount = 0; 325 break; 326 327 default: 328 /* 329 * Check for an unsupported executable opcode at module 330 * level. We must be in PASS1, the parent must be a SCOPE, 331 * The opcode class must be EXECUTE, and the opcode must 332 * not be an argument to another opcode. 333 */ 334 if ((WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1) && 335 (Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP)) 336 { 337 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 338 if ((OpInfo->Class == AML_CLASS_EXECUTE) && 339 (!Arg)) 340 { 341 ACPI_WARNING ((AE_INFO, 342 "Unsupported module-level executable opcode " 343 "0x%.2X at table offset 0x%.4X", 344 Op->Common.AmlOpcode, 345 (UINT32) (ACPI_PTR_DIFF (AmlOpStart, 346 WalkState->ParserState.AmlStart) + 347 sizeof (ACPI_TABLE_HEADER)))); 348 } 349 } 350 break; 351 } 352 } 353 354 /* Special processing for certain opcodes */ 355 356 switch (Op->Common.AmlOpcode) 357 { 358 case AML_METHOD_OP: 359 /* 360 * Skip parsing of control method because we don't have enough 361 * info in the first pass to parse it correctly. 362 * 363 * Save the length and address of the body 364 */ 365 Op->Named.Data = WalkState->ParserState.Aml; 366 Op->Named.Length = (UINT32) 367 (WalkState->ParserState.PkgEnd - WalkState->ParserState.Aml); 368 369 /* Skip body of method */ 370 371 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 372 WalkState->ArgCount = 0; 373 break; 374 375 case AML_BUFFER_OP: 376 case AML_PACKAGE_OP: 377 case AML_VARIABLE_PACKAGE_OP: 378 379 if ((Op->Common.Parent) && 380 (Op->Common.Parent->Common.AmlOpcode == AML_NAME_OP) && 381 (WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2)) 382 { 383 /* 384 * Skip parsing of Buffers and Packages because we don't have 385 * enough info in the first pass to parse them correctly. 386 */ 387 Op->Named.Data = AmlOpStart; 388 Op->Named.Length = (UINT32) 389 (WalkState->ParserState.PkgEnd - AmlOpStart); 390 391 /* Skip body */ 392 393 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 394 WalkState->ArgCount = 0; 395 } 396 break; 397 398 case AML_WHILE_OP: 399 400 if (WalkState->ControlState) 401 { 402 WalkState->ControlState->Control.PackageEnd = 403 WalkState->ParserState.PkgEnd; 404 } 405 break; 406 407 default: 408 409 /* No action for all other opcodes */ 410 411 break; 412 } 413 414 break; 415 } 416 417 return_ACPI_STATUS (AE_OK); 418 } 419 420 421 /******************************************************************************* 422 * 423 * FUNCTION: AcpiPsLinkModuleCode 424 * 425 * PARAMETERS: ParentOp - Parent parser op 426 * AmlStart - Pointer to the AML 427 * AmlLength - Length of executable AML 428 * OwnerId - OwnerId of module level code 429 * 430 * RETURN: None. 431 * 432 * DESCRIPTION: Wrap the module-level code with a method object and link the 433 * object to the global list. Note, the mutex field of the method 434 * object is used to link multiple module-level code objects. 435 * 436 ******************************************************************************/ 437 438 static void 439 AcpiPsLinkModuleCode ( 440 ACPI_PARSE_OBJECT *ParentOp, 441 UINT8 *AmlStart, 442 UINT32 AmlLength, 443 ACPI_OWNER_ID OwnerId) 444 { 445 ACPI_OPERAND_OBJECT *Prev; 446 ACPI_OPERAND_OBJECT *Next; 447 ACPI_OPERAND_OBJECT *MethodObj; 448 ACPI_NAMESPACE_NODE *ParentNode; 449 450 451 ACPI_FUNCTION_TRACE (PsLinkModuleCode); 452 453 454 /* Get the tail of the list */ 455 456 Prev = Next = AcpiGbl_ModuleCodeList; 457 while (Next) 458 { 459 Prev = Next; 460 Next = Next->Method.Mutex; 461 } 462 463 /* 464 * Insert the module level code into the list. Merge it if it is 465 * adjacent to the previous element. 466 */ 467 if (!Prev || 468 ((Prev->Method.AmlStart + Prev->Method.AmlLength) != AmlStart)) 469 { 470 /* Create, initialize, and link a new temporary method object */ 471 472 MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); 473 if (!MethodObj) 474 { 475 return_VOID; 476 } 477 478 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 479 "Create/Link new code block: %p\n", MethodObj)); 480 481 if (ParentOp->Common.Node) 482 { 483 ParentNode = ParentOp->Common.Node; 484 } 485 else 486 { 487 ParentNode = AcpiGbl_RootNode; 488 } 489 490 MethodObj->Method.AmlStart = AmlStart; 491 MethodObj->Method.AmlLength = AmlLength; 492 MethodObj->Method.OwnerId = OwnerId; 493 MethodObj->Method.InfoFlags |= ACPI_METHOD_MODULE_LEVEL; 494 495 /* 496 * Save the parent node in NextObject. This is cheating, but we 497 * don't want to expand the method object. 498 */ 499 MethodObj->Method.NextObject = 500 ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParentNode); 501 502 if (!Prev) 503 { 504 AcpiGbl_ModuleCodeList = MethodObj; 505 } 506 else 507 { 508 Prev->Method.Mutex = MethodObj; 509 } 510 } 511 else 512 { 513 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 514 "Appending to existing code block: %p\n", Prev)); 515 516 Prev->Method.AmlLength += AmlLength; 517 } 518 519 return_VOID; 520 } 521 522 /******************************************************************************* 523 * 524 * FUNCTION: AcpiPsParseLoop 525 * 526 * PARAMETERS: WalkState - Current state 527 * 528 * RETURN: Status 529 * 530 * DESCRIPTION: Parse AML (pointed to by the current parser state) and return 531 * a tree of ops. 532 * 533 ******************************************************************************/ 534 535 ACPI_STATUS 536 AcpiPsParseLoop ( 537 ACPI_WALK_STATE *WalkState) 538 { 539 ACPI_STATUS Status = AE_OK; 540 ACPI_PARSE_OBJECT *Op = NULL; /* current op */ 541 ACPI_PARSE_STATE *ParserState; 542 UINT8 *AmlOpStart = NULL; 543 544 545 ACPI_FUNCTION_TRACE_PTR (PsParseLoop, WalkState); 546 547 548 if (WalkState->DescendingCallback == NULL) 549 { 550 return_ACPI_STATUS (AE_BAD_PARAMETER); 551 } 552 553 ParserState = &WalkState->ParserState; 554 WalkState->ArgTypes = 0; 555 556 #if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) 557 558 if (WalkState->WalkType & ACPI_WALK_METHOD_RESTART) 559 { 560 /* We are restarting a preempted control method */ 561 562 if (AcpiPsHasCompletedScope (ParserState)) 563 { 564 /* 565 * We must check if a predicate to an IF or WHILE statement 566 * was just completed 567 */ 568 if ((ParserState->Scope->ParseScope.Op) && 569 ((ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_IF_OP) || 570 (ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_WHILE_OP)) && 571 (WalkState->ControlState) && 572 (WalkState->ControlState->Common.State == 573 ACPI_CONTROL_PREDICATE_EXECUTING)) 574 { 575 /* 576 * A predicate was just completed, get the value of the 577 * predicate and branch based on that value 578 */ 579 WalkState->Op = NULL; 580 Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE)); 581 if (ACPI_FAILURE (Status) && 582 ((Status & AE_CODE_MASK) != AE_CODE_CONTROL)) 583 { 584 if (Status == AE_AML_NO_RETURN_VALUE) 585 { 586 ACPI_EXCEPTION ((AE_INFO, Status, 587 "Invoked method did not return a value")); 588 } 589 590 ACPI_EXCEPTION ((AE_INFO, Status, "GetPredicate Failed")); 591 return_ACPI_STATUS (Status); 592 } 593 594 Status = AcpiPsNextParseState (WalkState, Op, Status); 595 } 596 597 AcpiPsPopScope (ParserState, &Op, 598 &WalkState->ArgTypes, &WalkState->ArgCount); 599 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", Op)); 600 } 601 else if (WalkState->PrevOp) 602 { 603 /* We were in the middle of an op */ 604 605 Op = WalkState->PrevOp; 606 WalkState->ArgTypes = WalkState->PrevArgTypes; 607 } 608 } 609 #endif 610 611 /* Iterative parsing loop, while there is more AML to process: */ 612 613 while ((ParserState->Aml < ParserState->AmlEnd) || (Op)) 614 { 615 ASL_CV_CAPTURE_COMMENTS (WalkState); 616 617 AmlOpStart = ParserState->Aml; 618 if (!Op) 619 { 620 Status = AcpiPsCreateOp (WalkState, AmlOpStart, &Op); 621 if (ACPI_FAILURE (Status)) 622 { 623 if (Status == AE_CTRL_PARSE_CONTINUE) 624 { 625 continue; 626 } 627 628 if (Status == AE_CTRL_PARSE_PENDING) 629 { 630 Status = AE_OK; 631 } 632 633 if (Status == AE_CTRL_TERMINATE) 634 { 635 return_ACPI_STATUS (Status); 636 } 637 638 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 639 if (ACPI_FAILURE (Status)) 640 { 641 return_ACPI_STATUS (Status); 642 } 643 644 continue; 645 } 646 647 AcpiExStartTraceOpcode (Op, WalkState); 648 } 649 650 /* 651 * Start ArgCount at zero because we don't know if there are 652 * any args yet 653 */ 654 WalkState->ArgCount = 0; 655 656 switch (Op->Common.AmlOpcode) 657 { 658 case AML_BYTE_OP: 659 case AML_WORD_OP: 660 case AML_DWORD_OP: 661 case AML_QWORD_OP: 662 663 break; 664 665 default: 666 667 ASL_CV_CAPTURE_COMMENTS (WalkState); 668 break; 669 } 670 671 /* Are there any arguments that must be processed? */ 672 673 if (WalkState->ArgTypes) 674 { 675 /* Get arguments */ 676 677 Status = AcpiPsGetArguments (WalkState, AmlOpStart, Op); 678 if (ACPI_FAILURE (Status)) 679 { 680 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 681 if (ACPI_FAILURE (Status)) 682 { 683 return_ACPI_STATUS (Status); 684 } 685 686 continue; 687 } 688 } 689 690 /* Check for arguments that need to be processed */ 691 692 if (WalkState->ArgCount) 693 { 694 /* 695 * There are arguments (complex ones), push Op and 696 * prepare for argument 697 */ 698 Status = AcpiPsPushScope (ParserState, Op, 699 WalkState->ArgTypes, WalkState->ArgCount); 700 if (ACPI_FAILURE (Status)) 701 { 702 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 703 if (ACPI_FAILURE (Status)) 704 { 705 return_ACPI_STATUS (Status); 706 } 707 708 continue; 709 } 710 711 Op = NULL; 712 continue; 713 } 714 715 /* 716 * All arguments have been processed -- Op is complete, 717 * prepare for next 718 */ 719 WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 720 if (WalkState->OpInfo->Flags & AML_NAMED) 721 { 722 if (Op->Common.AmlOpcode == AML_REGION_OP || 723 Op->Common.AmlOpcode == AML_DATA_REGION_OP) 724 { 725 /* 726 * Skip parsing of control method or opregion body, 727 * because we don't have enough info in the first pass 728 * to parse them correctly. 729 * 730 * Completed parsing an OpRegion declaration, we now 731 * know the length. 732 */ 733 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 734 } 735 } 736 737 if (WalkState->OpInfo->Flags & AML_CREATE) 738 { 739 /* 740 * Backup to beginning of CreateXXXfield declaration (1 for 741 * Opcode) 742 * 743 * BodyLength is unknown until we parse the body 744 */ 745 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 746 } 747 748 if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP) 749 { 750 /* 751 * Backup to beginning of BankField declaration 752 * 753 * BodyLength is unknown until we parse the body 754 */ 755 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 756 } 757 758 /* This op complete, notify the dispatcher */ 759 760 if (WalkState->AscendingCallback != NULL) 761 { 762 WalkState->Op = Op; 763 WalkState->Opcode = Op->Common.AmlOpcode; 764 765 Status = WalkState->AscendingCallback (WalkState); 766 Status = AcpiPsNextParseState (WalkState, Op, Status); 767 if (Status == AE_CTRL_PENDING) 768 { 769 Status = AE_OK; 770 } 771 } 772 773 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 774 if (ACPI_FAILURE (Status)) 775 { 776 return_ACPI_STATUS (Status); 777 } 778 779 } /* while ParserState->Aml */ 780 781 Status = AcpiPsCompleteFinalOp (WalkState, Op, Status); 782 return_ACPI_STATUS (Status); 783 } 784